 
 ;;; Public API
 
-(defmacro is
+(defmacro should
   "A series of assertions.  Each assertion is a simple expression,
   which will be compiled into a function.  A string will be attached
   as :doc metadata on the following assertion."

                          :line ~(:line (meta form))}
                         nil))
               nxt))
      `(SimpleContainer ~r {:generator is
                            :line ~(:line (meta &form))
                            :form '~&form}
                        nil))))

  decl   => name? docstring? option* child*

  name  => a symbol, will def a Var if provided.
  child => 'should' or 'given' or nested 'testing'.

  options => keyword/value pairs, recognized keys are:
    :contexts => vector of contexts to run only once for this container.
